distutils.strtobool

strtobool.py

# distutils has been removed in Python 3.12

def strtobool (val):
    """Convert a string representation of truth to true (1) or false (0).

    True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values
    are 'n', 'no', 'f', 'false', 'off', and '0'.  Raises ValueError if
    'val' is anything else.
    """
    val = val.lower()
    if val in ('y', 'yes', 't', 'true', 'on', '1'):
        return 1
    elif val in ('n', 'no', 'f', 'false', 'off', '0'):
        return 0
    else:
        raise ValueError("invalid truth value %r" % (val,))


def test_strtobool(self):
    yes = ('y', 'Y', 'yes', 'True', 't', 'true', 'True', 'On', 'on', '1')
    no = ('n', 'no', 'f', 'false', 'off', '0', 'Off', 'No', 'N')

    for y in yes:
        self.assertTrue(strtobool(y))

    for n in no:
        self.assertFalse(strtobool(n))